Improvement in bobbins



UL H. j 215%@ Emme@ Mu, /az 1 N 'gllnitrh tatrs` utwt @frn Y CHARLES HQ FISKE, vOF p LOWELL, MASSACHUSETTS;

Letters Patent No. 71,371, dated Noeember 26, 1867. i

IMPROVEMENT IN BOBBINS.`

die rtetult nimh tr in ilptttittr `@that ant inviting mut nt its ramt, lf r y f TO ALL WHOM IT MAY CONCERN:

Be it known that I, CHsnLEs H. Flslrn, of Lowell, Middlesex county, State of Massachusetts, have inventd a new and-useful AImprovement in` Filling-Bobbins "a.nd I dohcreby ldeclare that the follewingiisa full, clear, and exact description thereof, which will enable others skilled in the art tomakeL andiusc thcsame,ireference being had tothe accompanying drawing, forming part of this specieatiomin' whichi 4Figure 1 is an axial section of a hobbin made according to my'invention.

Figure 2 is a. top view, and 1 Figure 3 is a bottom view. p Similar letters of reference indicate like parts. i i i i i' '.Ihe object of this invention is the improvementof bobbins used in weaving to hold the `lling-yarn gp; and it consists in-gving to them a peculiar shape Lto prevent`th'e slipping of the lling, which is apt to occur in the operation of weaving. Y Much lss is occasioned from this cause, bothvin the amount of rwaste"`m'ade by the slipping off of the filling, and inthe time -necessarilyspent in stoppage ofthe lo`oms, `and` in also rewinding` i such portions of `the `yarn asare not hopelessly entangled, sometimes theentire bodyo lillingn a hobbn coming off at once. A l K i i, t i Ordinary lling-bobbins are now made with straight or regular tapering sides from heel to`point,'with `shallow circular grooves or indentations upon them. My improved bobbin is madeby turning'uponit a succes sion of inverted truncatedicones, so as to produce a succession of divisins inthe length` of the bobbimthe point` of the greater diameter ofieach division being at that part which is nearerthejend of `the'bobbim-and `the point of the less diameter being at the part which is nearer the base ofthe hobbin, so thatzthecoils'bf the` p filling are prevented from slipping o during the operation of weaving. The base of "thckbobbin is"conicalfor n little distance, and the sides of such conicalpart are turned into a succession of horizontal` terraces or steps with vertical sides. Those terraces are designated by the letter G. They are continued aslhigh a'sthe conical i portion of the bobbin, each terracebeing of'smaller diameter than that below it.' Thisconical portions intended i to aid in giving proper shape to the filling when being wound on. The greater part ofthe length of the bobbin i is theportion which extends from the top of the 4conical base to the end of theibobbin, which partyasbefore explained, is occupied by a succession of inverted truncated cones, D, whose respective diametersare equa throughout, and whose buses prevent the filling from slipping oi, and occasioning `lossy by fwastejfand loss o time in weaving. The bobbin may be made inl other respects .in any suitable way, anopening, 3B, beingrnade `through itto receive the spindle of the shuttle, and its bottom boing formed so as to iit `the railoflthe machine; on which it is placed tofreceive the filling. p t p p i i 1 The ordinary lling-bobbin, made with straight or regular `tapering sides, having a succession of shallow grooves or indcntations, has been found 'insucicnt vto prevent the filling from slipping, for the reason that` between the creases a smooth surface is left, upon which the filling cannot be held, and `from `whichit easilyi slips, if the usual tension is applied sulcient 'to properly weave thc-cloth. `It the creasesfareplaceditoo near each other, the bobbin is made so rough that the yarn will not unwind without-breaking, if the bobbin is revolved i, with the necessary rapidity. In bobbins of this construction it has been found necessary temake the topiof :in` increased diameter, exceeding the diameter of the remaining portion below it about one-sixteenth o f an inch for coarse work, and one thirty-second of an inch fer line work. This increased diameter, however, was@ found to be insutlcent to prevent waste, or the {illin'g `from slipping, and also caused the yarnf to `break badly, ,i By my `invention these difficulties are avoided. The bohbin is constructed with a series of tapers, madeto resemble inverted truncated cones, each of which. mayhave as much or the sa'me variatihnin itsdiameter as can be used in the entire length of thetapering bobbins in commonusfe, thereby multiplying the wedgngs p face of the bobbin to any extent required. Als soon as the yarn startsto unwind, the constantlyfincreasing diameter of each cone causes it to be heldiwith a wedging action, which tightens the remaining portion u ponfthe cone, and ciectually prevents it from slipping. The upper end or top of the bobbin is ofthe same diameter p, ,pithebasefof euch cone, all being the same. Bobbins of this constructiondoi not,`in anymanner,"preventthe yarn from unwinding,tunder the proper degree of tension, as rapidly asis necessary in `theproeess of weavin I claim as new, and desire tose'cure by Letters Patent` p p p A lling-bobbin whose sides, for a greater or less portion of its length, are formed to resemblea. `succession i of inverted truncated cones, substantially as described for the purpose specified.`` l

i CHAR LES n. rIsKEpV` p Witnesses: p 1i Suf` C.` PRATT,

WILKINs. 

